Loud speaker



June 6, 1933. J. ORENITS 1,913,234

LOUPSPEAKER Filed NOV. 27, 1931 UNITED STATES Patented June 6, 1933 PATENT OFFICE JAMES ORENITS, OF ELMHURST, NEW YORK noun SPEAKER Application filed November 27, 1931.

This invention relates to loudspeaker apparatus, such for example as that used in combination with radio receiving sets.

The invention will be fully and comprehensively understood. from a consideration of the following detailed description when read in connection with theaccompanying drawing which forms part of the application, with the understanding, however, that M the improvement is capable of extended application and is not confined to the exact showing of the drawing nor to the precise vated position, by means of supports 4, a magnet 5. The mentioned magnet may be either a permanent magnet or an electromagnet and has confronting poles 6 and 7 spaced from each other. A soft iron bar 8 is secured to the mentioned magnet by means of non-magnetizable brackets 9, the bar 8 being spaced from the magnet and being opposite the poles 6 and 7 of the same. An electrically conducting elongate loop 10 is positioned between the poles of the magnet and the bar 8 and is supported on conduct- Serial No. 577,598.

periment to give improved results over the previous types of loud speakers.

What is claimedas new and useful is:

1. A loud speaker apparatus comprising a magnet having oppositely disposed closely arranged poles, a bar of soft iron arranged in spanning relation to the poles but separated therefrom by an intervening space, a looped conductor disposed between said bar and said poles and arranged for connection to an energizing source and supported solely at one end to permit its being vibrated by variations in the current flowing therethrough, a diaphragm, and a drive pin connecting the diaphragm with said looped conductor.

2. Aloud speaker apparatus comprising a magnet having oppositely disposed closely arranged poles, a bar of soft iron ar ranged in spanning relation to the poles but separated therefrom by an intervening space, a looped conductor disposed between said bar and said poles and arranged for connection to an energizing source and supported solely at one end to permit its being vibrated by variations in the current flowing therethrough, a diaphragm, and a drive pin connecting the diaphragm with said looped conductor at an intermediate point in the length of the latter.

In testimony whereof I hereby affix my signature. 1

JAMES ORENITS.

ing members 12, which are connected to the terminals of the secondary circuit 13 of a transformer 14:, the terminals of the primary coil being connected to a microphone, for example. One side of the loop 10 is connected to a loud speaker .17 by means of a pin 18. The loud speaker 17 is mounted on abracket 18 which is secured to the base 3. The elongate loop 10, I have found, has a greater amplitude 1 of vibration than the usual circular loops employed and the apparatus described has been found by ex- 

